Ship-augek



To tu mama may/anagrafi;

` ,IlsjolvnfrroAGLAND.OFJERSEY Grrr, NEW JERSEY.

"dohereby declare thatthe following is a jull, clear, and eiactjzdescription y .of the same, reference being had to the annexed drawings,makingatpartof this specicai Figuresjl and 2,1a`re` 'side views of aportion of the screw, and `thefcutting edge of Imyfimproved auger,Qneviewbeing taken at a side opposite to that ofthe other. Fig.

"3 isanunder .view` of the same. Fig.` 4,1 the bit, "or additionalpiece,B,f`showing the side byjvvhichl itis connected with the augerstock.`v` Fig. `5, the same piece, showing the underor cutting side,thefbit, in all these "diagrams, vbeing` represented without the `wormor screw-which f is now generally omitted in my auger. Fig.` 6, an edgeView `ofthe same. Fig. 7 perspective viewof the same, the upper side"being shown, that is `the side by whichl it isjoined to the auger stock.Fig. 8, part offtheauger stock showing the `pin which is `permanent inthe stock land ts into the hole,`jf, in the bit.` Fig. 9,

the `auger stock end or bottom view-show- "ing thepin at, /",`an`d thescrew-hole at, c,

" yyandthe dovetail point`.at,cZ. Fig. 10, shows "the kind of screw usedto- `fasten on thebit.

`Similar letters `of reference indicate corresponding parts "inthefseveral iigures.

`The nature of myinventionconsists in `will proceed tol describe"fit,`

having the `cutting portion of the auger,

`made detached from the screw portion, and

attaching the cutting portion ilto the screw portion by means ofdowfelsandr screws, the

cuttingportionfbeing `ittedto the screw por#` tion in, dovetail form,will be hereafter ydescribed. .i

. To` enable `others skillediiinthe `art,\to l Jr'ully "understand andconstruct" `my invention, I"

f `the ,screw of represents a portion an auger, constructedl"`in theusual manner,

nd B, is the cutting portion which is-made detached `iz'r'omthescrew,"-1;A.` The upper "part of the `cutting\ portion, B, has a latrsponding inversely lwith the shoulder, (b) i f be strong and made totit4 close.

` y specifiea'idn of Letters raientno. 12,551, dated March eo, 1855.

. l on thecu-tting portion, B, (see Figs. l, 2.) Holtmann, of `JerseyCity, y in "the county lof Hudson and State' Ifof New Jersey, have`invented a2 new anduseful Improvementin Angers, andi Theflat surface,(a)I of the cutting portion, B, is placed against the at .surface, (c)on the under side of the screw, A, and the shoulder, (b) on the cuttingportion, B, and thefinclined end, (d) forms a dove-tail as clearly shownin Fig. 2. Thecutting portion is then secured to the screw, A, by ascrew (e) (see dotted lines in Fig. 2) and Va dowel, (f) also shownv bydotted lines in Fig.` 2, which serves to prevent any working `or play,between the cutting portion, B, and the screw, A.

. The bit, B, may be used with or Without the `.worin or center screw.For many purpo-ses of a tree-nail auger it isbetter withf out. There maybe but one dowel or more, but one is suflicient and this need not be ofmuch strength, as there is very little side pressure upon it. The screw,Fig. should y Each bit made for the stock should be fitted accuratelyand numbered and lettered to correspond with the stock. For instance aseries of stocks, A, may be made and marked with the letters of thealphabet. To each one of these stocks there may be several sizes ofbits, with a shade of difference marked, for

instance A, l, A, 2, A, 3, &c., all of which would be adapted to thestock marked,

A, and thus the borer, if supplied with -a proper number of auger stocksand the various Nos. of bits, would be able without loss of time to borefor any size of tree nail.

I have in this improvement in augers accomplished a great saving of timeto the borer. Often times the half of a day is lost wwwY STATES PATENTam@ wfhile the borer seeks a new auger and gets `his broken one mended,or gets the size of it adaptedto a new lot of tree nails. In my augerthe borer, on breaking the bit f againstaniron bolt or on receiving anew lotV of tree nails of a diferentsize, has but to unscrew one bit andput on another, and as the stocks are `for permanent use, yhe can aiordto have them made of cast steel and `polished so as to free themselveseasily,

kinds of augers, in use for diferent kinds of work. The advantage of theimprovement is obvious, for it is well known that the cuttin part of anauger, will not admit of much ling, and consequently a limited amount ofusage is obtained, and the cutting portion, is often completelydestroyed, by coming in contact with nails orbolts; in such cases theaugers of present construction are rendered entirely useless, and newones are required. By my improvement a new cutting' portion is onlyrequired, the screw, A, not being subject to wear, will last anindefinite period of time.

I do not confine myself to the precise method herein shown, forconnecting the Witnesses:

WILLIAM A. IAQUINS, HORACE C. TURSE.- r

